Keyboard locking up in Visual Studio 2010, Part 2

Last week I posted about looking into the keyboard locking up issue in Visual Studio.  So far it looks like not a lot of people have replied to provide concrete repro steps, which confirms my suspicion that this is somewhat of a random issue.

So at this point, I have a couple of choices.  I can either wait for somebody in the community to provide a repro of the problem that I can reliably run into, or I can do the work myself.

I’m going to do both, so while I’m waiting for more possible bug reports, I’m going to write a tool that models the behavior of a typical Visual Studio user and use that to hopefully isolate the problem.

I’ve chosen to go with this path since given the information in the bug reports, it seems people hit the issue with many different configurations in many different scenarios.  This means that me sitting down without any solid repro steps is likely not going to be a good use of time.  Instead, I’m going to go with a model-based testing approach where I will define a series of actions that a user in VS can do, and then proceed to run my model.  I’ll let you guys know how this works out for isolating bugs :)

I’m using an internal tool for the model engine and AutoIt for the UI automation (I want something lightweight for a one-off).  One of the challenges will be getting feedback: AutoIt is great at driving, but not so great at understanding what success and failure means.

124 Comments

  • The reason you did not get any repro steps for this is because there are no specific repro steps.
    here are some of the symptoms (and possibly causes) for this issue:
    - It seems that whenever the keyboard locks up it's usually at the same time that multiple instances of the csharp-compiler (csc.exe) (or vb-compiler - or for that matter any compiler) are running. - this usually happens when attempting to save changes to a file. the issue is that it's not consistent but once it starts happening it does not usually stop until you restart visual studio.
    - It seems that the compiler starts taking longer to run when the memory-usage for visual studio starts getting higher - though this is not guaranteed, I've had cases where VS was using a large amount of Memory but did not encounter this issue.
    - The issue is not limited to the keyboard locking, at some points it seems that the entire visual studio locks for the same reasons.

  • @Jack: Yeah basically I think it's a combination of multiple issues, and the push for model based testing is one of the ways to isolate issues individually as the model grows out and simulates user interaction, which is why this is interesting. It is possible that it's a timing problem though, but hopefully there is a series of steps that can be isolated that lead to higher repro instances.

  • @Jack: Thanks for the additional feedback though, I'll be sure to consider adding stress scenarios to the model.

  • One more guess... what if it's somehow related to recent Win7 to SP1 updates?

  • Not a bad thought Koistya...perhaps some of the issues are, but we had a lot of bug reports prior as well so the majority of the problems likely happened before.

  • I've been having this issue on multiple machines, some running win7 and some running xp, all different configurations, some newer some older. Another thing to consider is extensions, on some of the machines I've seen ReSharper installed (which I believe can add to these issues).

    my guess as to why the compiler was running every time I pressed save (and some times even after making a simple change without pressing save) was so that the IDE can give feedback as to scripting errors / issues. - though you'd think that such a thing is not necessary, this was the only explanation I could think of as to why the compiler had to run so often. - another possible explanation would be that the compiler runs for ReSharper. (though not all machines had ReSharper installed)

  • I has read the locking keyboard of Jimmy Wang Blog. It is happen to operations usually. It was adding of #define On_Click()=hWnd (formform1) set operaName = my.name; operaVersion = my.system;
    formform1=newform.propertySystem(){wtConsole=newConsole{"operaName";"operaVersion"}} open Console.wtConsole();

  • this happens to me when I am creating/modifying html attributes.

  • For me, it always happens whenever I open an aspx/ascx page, though not ONLY then. It locks for 30-60s without any significant CPU on XP SP3.

    I was beginning to suspect network DLLs/TFS/anti-virus combination. As one morning I had an error message about Intelli-sense & network referenced DLLs, but then copying locally did not seem to improve it...

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